DICOM UIDs
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转自:https://groups.google.com/forum/#!topic/comp.protocols.dicom/xh0ogPv31aI
Definitions:
Study = collection of separate medical examinations for a certain
patient. A patient can have, in the same study, images from different
Modalities. All the images resulted during these examinations - often
referred to as IODs - will bear the same Study UID.
Usually you will find a study to contain images from one modality (MR,
CT, CR etc).
Series = Collection of images taken during one examination by ONE
modality. All images in a series share the same series instance uid
(and study instance UID, as pointed above) and are produced by one (and
only one) modality.
SOP Instance = equates to a dicom IOD (or simply, image).
IOD = TLA for Information Object Definition - the representation of a
real-world piece of information.For example, an Image aquired by a CT
scanner and stored in dicom format will thus be a dicom IOD.
SOP Class = if you're dealing primarily with dicom IODs, it is useful
to think of the SOP Class in terms of an "image format".
Modality = In its broadest definition, modality is a provider of
information, be it an image or some other content (such as Structured
Reports).
Dataset = a collection of records that make up the dicom IOD. The
records that make the dataset are delimited by Tags, each tag
identifying a certain piece of information, as a patient name,
referring physician etc.
UIDS:
Study instance UID is unique for each study. Series UID is unique for
each Series. SOP Instance UID is unique for each Image.
Each Image (dicom IOD) will contain all three UIDs.
The relationship between the Study/Series/Instace is:
a STUDY HAS Multiple SERIES which HAVE Multiple SOP Instances (images).
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